How To Change In-App Time?

[Vorherrschaft]

I did a glitch to Spotify, where if you change the time in general settings you get an extended trial period (like 4000 days). However, you aren't able to use any app that uses internet (for example in the itunes app, it says I have a bad/old certificate). I assume there would be a way to use iFile or someother Cydia app/tweak to change the time in one particular app?